6-BA对干旱胁迫水稻幼苗叶片显微结构的影响  

EFFECTS OF 6-BA ON THE MICROSTRUCTURE OF THE LEAF OF RICE SEEDLINGS UNDER WATER STRESS

作　　者：胡雪琴[1] 王三根[1] 

机构地区：[1]西南农业大学农学系,重庆400716

出　　处：《西南农业大学学报（自然科学版）》1999年第6期505-509,共5页Journal of Southwest Agricultural University

基　　金：国家自然科学基金!39670441;农业部"九五"重点研究资助!95农-17-01;重庆市应用基础研究资助!渝科委计[1998]28

摘　　要：采用聚乙二醇（PEG－6000）模拟土壤干旱，在不同浓度6-苄基腺嘌呤（6－BA）处理下，研究水稻幼苗形态结构变化。结果表明，在正常条件下，适宜浓度6－BA（0．1－1．0μg／L）增加水稻的鲜干重及根冠比，使叶增厚，叶肉细胞中叶绿体及叶绿素含量增加。在PEG胁迫下，适宜浓度的6－BA可使叶内形成气腔，促使叶增厚，叶硅质细胞增加，运动细胞群增大，减少叶肉细胞内叶绿体及叶绿素的降解。表明适宜浓度的6-BA不仅可以在正常条件下促进水稻生长，也能提高水稻的抗旱性，在干旱胁迫下维持其正常生长。PEG-6000 was used to simulate soil water deficiency (- 0.4 MPa).In treatments with 6 BA at difierent concentrations,the micro-struture of the leaf of rice seedlings was examined.Without water stress, 6-BA with a concentheion in the range of 0. 1 ~ 1.0μg/L increased the fresh/dry weight and root:shoot ratio of the seedlings,the thickness of their leaves and the number of chloroplast and chlorophyll content.Under water shress created by PEG,the above concentrations of 6-BA promoted the formation of air cavities within the leaf,thus making it thicker,increased the number of silicon cells and bulliform cells and inhibited the degradation of chloroplasts and chlorophyll in the mesophyll cells.It is,therefore,speclated that at suitable concentrations,6-BA can not only promote the growth of rice under normal conditions but also increase its drought-resistance and thus help it survive water stress.

关 键 词：6-苄基腺嘌呤 干旱胁迫 叶片显微结构 水稻 

分 类 号：Q948.112[生物学—植物学]